Helper Matrix Testing for Stable Biometric Authentication Data
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Solution Overview
Problem
The security of biometric data used for user authentication in electronic devices is a critical issue due to its unique and important nature, necessitating a stable authentication scheme that does not rely on the biometric data itself, and there is a need to test the helper matrix used in fuzzy technology-based authentication to ensure stability of authentication data.
Innovation Solution
An electronic device employs a processor to apply helper matrices to biometric data to generate reproduced authentication data, which is then tested using a Kolmogorov-Smirnov test scheme to ensure the helper matrix does not include user-specific information, and performs error correction on the reproduced data without converting it to binary form.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If biometric data is used directly for user authentication, then authentication convenience is improved, but security is worsened because biometric data can be stolen, copied, or lost
Solution Approach 1:
The patent extracts the essential authentication functionality from the biometric data itself by generating authentication data through fuzzy extraction. Instead of using biometric data directly, the system extracts authentication data that can be securely stored and used for verification, separating the authentication function from the sensitive biometric information.
Solution Approach 2:
The patent introduces authentication data as an intermediary between biometric data and the authentication decision. This authentication data acts as a mediator that preserves user convenience while enhancing security, as it can be securely stored and transmitted without exposing the original biometric information.
2Reliability
If fuzzy technology is used to generate authentication data from biometric data, then security is improved, but the need for testing helper matrices adds device complexity
Solution Approach 1:
The patent implements self-service by having the electronic device automatically perform helper matrix testing as part of the authentication process. The device tests its own authentication data and helper matrices without requiring external verification, ensuring security while maintaining operational simplicity.
3Device complexity
If traditional authentication methods are used, then device complexity is reduced, but authentication accuracy and stability are worsened
Solution Approach 1:
The patent changes the parameters of authentication by transitioning from direct biometric comparison to fuzzy extraction with helper matrices. This parameter change enables more accurate and stable authentication by accounting for variations in biometric data while maintaining a relatively simple device architecture.
Data Source
AI summary
An electronic device may include: at least one processor; and at least one memory including instructions. When executed by the processor, the instructions may cause the electronic device to: select reference data from a secure space configured for authentication data; apply a first helper matrix to first data in the secure space so as to generate first playback authentication data to be mapped to the first data; apply a second helper matrix to second data in the secure space so as to generate second playback authentication data to be mapped to the second data; and test the first helper matrix and the second helper matrix on the basis of a first angle between the first playback authentication data and the reference data and a second angle between the second playback authentication data and the reference data. Other embodiments are possible.